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Series NKVW vacuum pumping system is composed of vacuum pump and Roots pump, Roots pump automatically works by the controlling of relays or electrical-contact vacuum gauge. NKVW equips an electrical control system and a cooling water system.

TPF oil filtration machine is special for filtering waste cooking oil, dirty vegetable oil, trench oil, swill oil and animal oil etc., it effectively and completely removes particles, odor, water, acid and alcohol etc. from waste oil.

This machine can quickly remove water,trace water,gas, particles as well as acetylene,hydrogen,methane and other harmful ingredients from oil effectively to improve oil's dielectric strength,waterproof,dustproof,it can move long distance working in field.